• GSM / Cellular Channels: 8 independent channels (Quad-Band: 850/900/1800/1900 MHz; optional 3G/4G/LTE support depending on the exact model).
• VoIP Protocols: SIP (RFC3261) and IAX2.
• Transport & Security: UDP, TCP, TLS, SRTP, OpenVPN, Firewall, and VLAN.
• Audio Codecs: G.711 (A/u-law), G.726, G.729A, GSM, and Speex.
• Network Interfaces: 1 or 2 Ethernet ports (10/100 Mbps LAN/WAN).
• SIM Card Management: Hot-swappable SIM slots, auto CLIP, and SMS-to-Email / Email-to-SMS features.
• Power Supply: DC 12V or AC 100–240V (50/60Hz); typical power consumption around 10W.
• Dimensions & Weight: Roughly 190mm × 140mm × 35mm to 340mm × 210mm × 44mm; bare weight around 0.76 kg to 2.0 kg.

Alternative: 8-Port GSM Modem Pool (Bulk SMS Appliance)

• Capacity: 8 SIM slots designed for mass text broadcasting (up to ~600 SMS per port/hour or thousands per hour depending on the hardware controller like the 8-port GSM Modem Pool).
• Interface: USB 2.0 or RS-232 serial control using standard AT commands (GSM 07.07/07.05).
• OS Compatibility: Windows, Linux, and macOS support


ALSO, AVAILABE ON 4, 16 AND 32 PORTS